2 YEAR OLD VOMITING

My daughter 2.10 often vomits projectile for the last 3 weeks or so its been every other day or so usually at night after shes gone to sleep or just before. Sometimes after a coughing fit but not always. A few times its been in the middle of the day. For about 6 months shes been sick at least once a month just once then its over and done with. S he has also been falling over an awful lot in the last week and having wee accidents a few times a day after been very reliable for over 12 months. Otherwise not unwell but very wingy.